Friction draft gear



Feb. 22 1927.v

B. w. KADl-:L

FRICTION DRAFT GEAR Filed Jn. 12, 1924 2 sheets-sheet 2 Patented Feb. 22, 1927.

UNITED s'rAriasl PATENT OFFICE.

'BYERS w. KADEL, 0E BALTIMORE, MARYLAND, AssrGNon, BY MESNE ASSIGNMENTS,

To THE SYMINGTON COMPANY, 0E NEWYOEK, N. Y., A coEPoEATroN or MAE'Y- LAND.

ERICTIYON V*DRAFT GEAR. Y

The invention relates to railway draft rig-- lOing. f

One of the principal features of the present invention, broadly Stated, is to provide a friction draft gear of strong and economical construction primarily adapted for light receiving theV initial shocks, said friction shoes being connected by means interposed therebetween and the last named springs whereby in additionfto the frictional resistancev between the casings and friction shoes there is developed a comparatively one casing-of the draft'gear, and a rear follarge frictional resistance between the friction shoes and the means connecting the same.

Another object of the invention is to provide a friction draft gear in which the friction members are advantageously connected transversely of the draft rigging, the means connecting said friction members acting to permit relative movement `therebetween and also serving to maintain them in Vassembled position when removed from thedraft igging, said .means a'lso operating as a friction member yfor increasing the frictional resistance of the draft gear;

A still further objectv ofV the invention is to provide a friction Shock absorbing mecha nism for 4railway draft rigging involving a plurality of`casings each having friction faces, and a plurality of ing frictionfaces cooperating with the friction faces .of the casings, means connecting the frictionshoes for `movement transversely ,of the draft rigging, said means involving slottedplate members adapted to limit the outward lmovement of the friet-:ion shoeseand coactiii'g'therewitli for developing increased frictional resistance within the mechanism.

the scope whereof is kpointed outinthe appended claims: l 1

Figure 1 is a. view in side elevation of my friction shoes havimproved shock absorbing mechanism embodied ina railway draft rigging of the Farlo-w type.

Figure 2 is a vertical longitudinal sectional view on an .enlarged Scale of the shock vabsorbing or cushioning mechanism removed from the draft rigging. Y

Figure 3 isahorizontal longitudinal sectional view on theline 3-.3 of Figure'EZ.

Figure l is aver-tical -transverse' sectional view on Athe line 1-4;,of Figure 2.

Figure is a vertical transverse sectional view on the line* -'f of Figure 2.

Referring to the drawingsA in which .simi- `lary reference characters vdesi,c ,nate corresponding parts in the .several views, my improved construction of friction draft gear is shown applied to a draftrigging of .the Farlow type in whichfthe coupler 1 is shown connected to the yoke 2 by means of a key 3. Arkey-,connected vfollower bis shown interposed between the butt of the coupler and lower 5 is 'shown interposed between the rear Acasing 4of the draft gearv and the yoke. A

back stopv member isshown at 6.

rFhe friction draft' gear comprises a vplurality of casings 7 and 8 each having op- Apos'itely disposed inclined vfriction 4faces 9. The friction faces 9 are formed on the wall alighter spring 16, both ofsaidspringsy seating upon suitable shoulder portions ofv the respective shoes, as shown. The friction shoes 4are connected by means' including plates 17, said plates lbeing slotted, as at 18, and operating inthe 'nature of l-ink members foiI inaintainingthe shoes lin assembled re lation when removed frointlie-draft rigging In .the drawings illustrating they invention, ,but also' permitting relative movement of said shoes when interposed betweenthe casin'gs. Each friction Asli-oe is provided with a plurality of projections 19, said, projecsoY ics

tions extending into the slots of the respective plates 17 which latter operate to limit the outward or transverse movement of said slices with respect to the draft rigging in which the gear is positioned. The projections 19 are preferably provided with angular faces 2O adapted to coact with similarly inclined faces 21 provided at each end of the slot in the plates 17.

The plates 17 are interposed bet-ween the friction shoes and the relatively heavy spring 22 mounted within each casing, said plates operating as friction elements in conjunction with the friction shoes for increasing the frictional resistance of the draft gear. The plates 17 may be termed spring plates in that the heavy springs 22 bear directly upon said plates in transmitting the loads. Relatively light springs 23 are also provided within the casings, said springs bearing against the plates 17, as shown.

In operation it will be observed that as the casings or housings approach each other, the wedg-e action causes the friction members to approach' each other transversely of the gear. This approach movement is resisted by the transversely arranged springs which react against the two center friction members. are also effective in producing friction as the resistance of these springs causes a heavy friction to develop between the ends of the friction members and the spring plates upon which the main springs seat. It will also be noted that in removing the friction elements from the draft gear, that the plate members 17 operate to hold thesame in assembled position thereby producing a very convenient construction.

I claim:

1. In a railway draft rigging, the combination with draft sills, of a yoke, a coupler connected to said yoke, and a cushioning mechanism comprising complementary casings each having an inclined face, a plurality of friction elements each provided with a friction` face cooperating with an adjacent inclined face onl the casings, a spring int-erposed between said friction elements, a spring interposed between said friction elements and each of the adjacent casings, and

means between said last mentioned springs and elements, and connecting said elements, said means acting to permit relative movement between them and also serving to maintain them in assembled relation when removed from the draft rigging.

2. In a draft rigging, the combination ,with draft sills, of a yoke, a coupler connectthe inclined faces of said casings, a spring interposed between said friction elements, a

The main longitudinal springs spring interposed between each casing and friction element, and means frictionally engaging and connecting said fric-tion elements,

said means acting to maintain them in as- Y sembled relation when removed from the comprising spaced casings each having av plurality of inclined faces thereon, a plurality of friction shoes each provided with a plurality of friction faces cooperating respectively with the inclined faces on said casings, a spring interposed between said friction slices, a spring interposed between each casing and said friction shoes, and means connecting said friction shoes, said means being spring pressed against the friction shoes acting to permit relative movement therebetween and also serving to maintain the same `in assembled posit-ion when removed from the draft rigging.

4L. A draft gear comprising a plurality of casings each having a plurality of friction faces, a plurality of friction shoes'each having a plurality of fric-tion faces adapted to cooperate respectively with the friction faces on said casings, a spring interposed between said slices, a spring interposed between each casing and said friction shoes, and means spring pressed against and connecting said friction shoes, and acting to maintain them in assembled relation when removed from the gear.

5. A draft gear comprising a plurality of casings each having a plurality of friction faces, a plurality of friction shoes each having a plurality of friction faces adapted to cooperate respectively with th-e friction faces on said casings, a spring interposed between said shoes, a spring interposed between each casing and said friction shoes, and means incliiding a link meinberon either side of and connecting said friction slices, said member permitting relativ-e movement of theV friction shoes when positioned in the draft rigging and also serving to maintain vthem in assembled position when removed froin the gear.

6. A draft gear comprising spaced casings each having a plurality of oppositely inclined friction faces, a plurality of friction shoes interposed between said casings, said slices each having a plurality of friction faces adapted to coact respectively with the friction faces on said casings, spring means interposed between said friction shoes, spring means disposed between each casing and said shoes, and means positioned between said last mentioned spring means and shoes for increasing the capacity of the gear and maintaining said shoes in assembled position when removed from between the casings.

7. A friet-ion shock absorbing mechanism -IJI ' casings each for railway draft rigging comprising spaced casings each having a plurality of oppositely inclined friction faces, a phirality of yfriction shoes interposed between said casings, said shoes having a plurality of friction faces adapted torcoact respectively with thefriction faces on said casings, a spring interposedbetween said friction shoesa spring arranged between each casing and said shoes,

and means adapted to connect said shoes'and maintain them in assembled positionwhen removed from between the casings, said means being interposed between the spring said shoes having a plurality of friction faces adapted to co'act respectively with the friction faces on said caSings, a springinterposed between said friction slices, a

spring arranged `between each casing and said slices, and slotted means 'connecting said friction shoes for-maintaining them inl assembled relation when removed from between the casings, said means also permitting relative movement of the friction shoes when in operative position between said casings. Y f. 1 -K 9. A friction shock absorbing mechanism for railway draft rigging comprising spaced having a plurality of oppositelyinclined friction faces, a plurality of friction shoes interposed betweeiisaid casings, said shoes each having a plurality of friction faces adapted to coact respectively with the friction faces ony said ci gs a spring interposed between said frictio ing and said friction shoes, projections on said shoes and slotted plate means adapted to receive the projections on said shoes for limiting the relative out-ward moven shoes, spring arranged between each cas-V i'n'clined' friction faces, a pluralityy of friction slices interposed between said casings,

. said shoes having friction faces coacting respectively 'with the inclined faces on said casings, a plurality of plates connecting said friction shoes-)adapted toV permit movement of thel shoes transversely of the dra-ft rigging, a spring interposed between'said friction shoes, and a spring interposed between said plates and each casing.

1l. A friction shock absorbing mechanism Vfor railway draft rigging comprising spaced casings eachhaving aplurality of friction faces,a plurality of friction shoes interposed between saidcasings, said shoes each having lfriction facescoacting respectively with the friction faces Aon said casings, means including av plurality of plates with transverse faces frictionally contactinglsaid shoes and permitting relative movement thereof transversely of Vthe draft rigging, means for" ,maintaining said friction shoes in contact' with thecasings, and means for maintaining theplates in frict-ional' engagement with saidrshoes, said means incliiding springs.

i2.V A cushioning mechanism comprising a plurality ofv casings having opposed friction i faces, a plurality of friction shoes having faces cooperating with the'faces on said casiiigs, .means connecting said friction shoes,

saidmeans permitting relative movement of the friction shoes transversely of the casings, and means'including a springinterposed between said .casings and said last named means for frictionally maintaining the means connecting the friction slices in frictional engagement therewith.

, 13. A friction shock absorbing mechaiiismfor railway draft rigging comprising spaced casiiigs each having a plurality of friction faces, a plurality of friction members having facescooperating with the faces A o-ii said casings,means connecting said fric-V tionineinbers for movement transversely of the draft-rigging, and means for maintaining said last named means in frictional engagement with said Vshoes for increasing the capacity of said mechanism.

In testimony whereof I aiiix my signature.

' BYERS W. KADEL. 

